[1]朱林,许兴,赵小红,等. 基于18O稳定同位素对银川平原北部4种灌木夏季水分利用特征研究[J].西北林学院学报,2012,27(04):24-30.
 ZHU Lin,XU Xing,ZHAO Xiao-hong,et al. Characteristics of Water Use of Four Bushes Growing in Northern Areas of Yinchuan Plain in Summer Based on the 18O Stable Isotope Analysis[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2012,27(04):24-30.
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 基于18O稳定同位素对银川平原北部4种灌木夏季水分利用特征研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第27卷
期数:
2012年04期
页码:
24-30
栏目:
出版日期:
2012-07-30

文章信息/Info

Title:
 Characteristics of Water Use of Four Bushes Growing in Northern Areas of Yinchuan Plain in Summer Based on the 18O Stable Isotope Analysis
文章编号:
1001-7461(2012)04-0024-07
作者:
 朱林许兴赵小红唐建宁
(1.宁夏大学 西北退化生态系统恢复与重建教育部重点实验室,宁夏 银川 750021;2. 中国科学院 水利部 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨陵 712100;3.吴忠市利通区农业技术推广服务中心,宁夏 吴忠 751100;4.宁夏林业局林业技术推广总站 宁夏 银川 750021)
Author(s):
 ZHU Lin XU Xing ZHAO Xiao-hong TANG Jian-ning
关键词:
 稳定氧同位素银川平原盐碱地地下水利用
Keywords:
 stable oxygen isotope Yinchuan Plain saline land groundwater utilization
分类号:
S715.5
文献标志码:
A
摘要:
 为了分析银川平原北部4种灌木对不同水源的利用特征,测定了20年生多枝柽柳(Tamarix ramosissima)、3年生多枝柽柳、3年生宁夏枸杞(Lycium barbarum)和3年生四翅滨藜(Atriplex canescens)木质部水及不同潜在水源稳定氧同位素组成(δ18O),应用同位素线性混合模型估算了不同灌木对不同水源的利用率。结果表明:不同深度土壤水δ18O值存在较大差异,并呈规律性变化。表层(0~5 cm)土壤水δ18O值较井水δ18O值偏正,说明其受蒸发影响较大。120~140 cm土层δ18O值最正,说明该土层同位素分馏作用最大。140~200 cm土壤水受蒸发影响最小,土壤水δ18O与井水最为接近。3年生多枝柽柳、3年生宁夏枸杞、3年生四翅滨藜的木质部水δ18O值分别为-8.62‰、-8.64‰和-9.23‰,均比20年生多枝柽柳木质部水δ18O(-9.40‰)偏正。用IsoSource软件计算的结果显示20年生多枝柽柳和3年生四翅滨藜对地下水和表层土壤水(0~5 cm)的利用程度较高,分别利用11.6%和9.3%的地下水,18.2%和14.6%表层水。3年生多枝柽柳和3年生宁夏枸杞对40~120 cm土层水分利用程度较高,分别为93.8%和92.3%。

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